On 08/09/10 23:59, Jack Neely wrote:
Folks,

I'm running a KVM guest on HP blades and I've stumbled across a problem.
Even though the physical hardware is not busy at all, some times my
guests will report things like:

     INFO: task java:2989 blocked for more than 120 seconds.

and

     BUG: soft lockup - CPU#0 stuck for 10s! [java:870]

There are numerous reports of similar behavior on debian and ubuntu:

     https://bugs.launchpad.net/ubuntu/+source/linux/+bug/333201

But they are for higher versioned kernels.  The guest is running
2.6.18-194.11.1.el5 and the host is running 2.6.18-194.3.1.el5.

Anyone know what's happening here?  The timestamps of these logs
correspond with outages.

Jack Neely

I've seen this on flakey hardware. KVM and ESX show up hardware problems because they really make the system work. Migrate the guests elsewhere and run a hardware test and check hardware monitoring agents for problems. Check cooling too.

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